Ex-Soros trader quits hedge fund Key Square to go solo Financial TimesA commodities trader who previously worked under George Soros has quit New York-based hedge fund Key Square Capital to set up his own advisory venture, in the latest sign that senior industry figures are morphing from money managers into consultants. William Callanan, 48, who worked as London-based senior managing director for Key Square, a $5bn-in-assets fund, left the firm in April and has set up Syzygy Investment Advisory. Rather than managing assets itself, Syzygy — an astronomical term for the alignment of three celestial bodies — will provide long-term investment themes and aggressive...